package com.xszx.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@CrossOrigin
@Configuration
public class CorsConfig {

    //当前跨域请求最大有效时长。这里默认1天
    private static final long MAX_AGE = 24 * 60 * 60;

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOriginPattern("*");
//        corsConfiguration.addAllowedOrigin("http://localhost:8081"); // 1 设置前端的访问源地址
        corsConfiguration.addAllowedHeader("*"); // 2 设置访问源请求头
        corsConfiguration.addAllowedMethod("*"); // 3 设置访问源请求方法
        corsConfiguration.setMaxAge(MAX_AGE);
        source.registerCorsConfiguration("/**", corsConfiguration); // 4 对接口配置跨域设置
        return new CorsFilter(source);
    }

    // 在 Spring Boot 项目中添加 CORS 配置
//    @Configuration
//    public class CorsConfig implements WebMvcConfigurer {
//        @Override
//        public void addCorsMappings(CorsRegistry registry) {
//            registry.addMapping("/**")
//                    .allowedOrigins("http://localhost:8081") // 前端端口
//                    .allowedMethods("GET", "POST", "PUT", "DELETE")
//                    .allowedHeaders("*")
//                    .allowCredentials(true);
//        }
//    }

}
